VAG Operation and Maintenance Instructions • 3
1 General
1.1 Safety
Warning
/
Caution
:
These Operation and Maintenance
Instructions must be observed and applied at all times
along with the general “VAG Installation and Operation
Instructions for Valves” (see www.vag-group.com / Ca-
tegory: Installation and Operation Instructions).
Arbitrary alterations of this product and the parts supplied with it
are not allowed. VAG will not assume any liability for consequen-
tial damage due to non-compliance with these instructions.When
using this valve, the generally acknowledged rules of technology
have to be observed (e.g. national standards, ASME/AWWA etc.).
The installation must only be carried out by qualified staff (see
also Section 7.1 General safety instructions). For further technical
information such as dimensions, materials or applications, please
refer to the respective documentation (KAT 1321-A).
VAG valves are designed and manufactured to the highest stan-
dards and their safety of operation is generally ensured. However,
valves may be potentially dangerous if they are operated impro-
perly or are not installed for their intended use.
Everyone dealing with the assembly, disassembly, operation,
maintenance and repair of the valves must have read and under-
stood the complete Operating and Maintenance Instructions (Ac-
cident Prevention Regulations and ANSI Z535).
Before removing any protective devices and/or performing any
work on the valve, depressurise the pipeline section and ensure
it is free of hazards. Unauthorised, unintentional and unexpected
actuation as well as any hazardous movements caused by stored
energy (pressurised air, water under pressure) must be prevented.
In case of equipment that must be monitored and inspected, all
relevant laws and regulations, such as the Industrial Code, the
Accident Prevention Regulations, the Ordinance of Steam Boilers
and instructional pamphlets issued by the Pressure Vessels Study
Group must be complied with. In addition, the local accident pre-
vention regulations must be observed.
If a valve serving as an end-of-line valve is to be opened in a pres-
surised pipeline, this should be done with the utmost care to pre-
vent the emerging fluid from causing damage. Care must also be
taken when closing the valve to avoid crushing or trapping.
When a valve needs to be dismantled from a pipeline, fluid may
emerge from the pipeline or the valve. The pipeline must be emp-
tied completely before the valve is dismantled. Special care needs
to be taken in case of residue which may continue flowing.
1.2 Warning levels
The following warning levels are used in this manual
•
Danger:
Used for personal injury (immediate danger).
Possible consequences if the safety instructions are not follo-
wed: Death or serious injuries
•
Warning:
Used for personal injury (possibly dangerous
situation).
Possible consequences if the safety instructions are not followed:
Death or serious injuries
•
Caution
:
Used for personal injury
Possible consequences if the safety instructions are not followed:
Light or minor injuries
•
Caution
:
Used for proberty damage
Possible consequences if the safety instructions are not followed:
Material damage to the unit or its surroundings
1.3 Proper use
The VAG EKN
®
Butterfly Valve type AWWA is a shut-off valve de-
signed for installation in pipelines.
The VAG EKN
®
Butterfly Valve type AWWA is intended to shut
off the medium. Its use as a control valve is only possible within
certain limits.
VAG EKN AWWA Butterfly Valves are designed acc. AWWA 504
standard with maximum working pressure of 150 psig and a ma-
ximum full open velocity of 16 ft / sec. Temperature range acc.
AWWA 33° - 125° F.
For any deviating operating conditions and applications, the
manufacturer’s written approval must be obtained!
These Operation and Maintenance Operation Instructions contain
important information on the safe and reliable operation of the
VAG EKN
®
Butterfly Valve type AWWA.
Observing these Operation and Maintenance Instructions helps
you to:
• Prevent hazards
• Reduce repair costs and down-time of the valve and/or the en-
tire equipment
• Improve the operational safety and useful life of the equipment.
1.4 Identification
According to AWWA C 504 / section 6.1 all valves bear an identi-
fication label specifying the valves size, class, body material and
the manufacturer’s logo.
A rating plate is attached to the body and contains at least the
following information:
VAG
Manufacturer’s name
Valve size
Size of the of the valve in inch
Class
Nominal pressure of the valve in psi
Body material
Date of manufacture
